Once every synodic month, the Sun, Moon and Earth move into a geometry that puts Earth inside the Moon’s downstream sodium stream. Neutral atoms released from lunar soil have been accelerated away ...
For decades, the ultracompact X-ray binary 4U 1626−67 has behaved like a machine that periodically changes gear. Its neutron star spun faster for years, slowed for roughly 18 years, then began ...
NASA Goddard's Moving Roman: Propulsion visual, showing technicians working around Roman propulsion hardware. Credit: NASA's Goddard Space Flight Center. NASA SVS source. Used for factual editorial ...
Enhanced-color view of Deimos acquired by the HiRISE camera on NASA's Mars Reconnaissance Orbiter on February 21, 2009. Credit: NASA/JPL-Caltech/University of Arizona ...
ALMA and SPHERE views of the young triple star GW Orionis, released by ESO in 2020. Left: ALMA’s radio image of the system’s misaligned dust rings. Right: the SPHERE instrument’s infrared view of the ...
How do you prove that nobody, anywhere on the planet, has secretly detonated a nuclear weapon? You can’t inspect every country’s territory on demand, and you can’t take anyone’s word for it either.
Tellurium is one of the scarcer things you can pull out of the ground. It sits at about 3 parts per billion in most rock, which the same source puts at roughly eight times rarer than gold. You don’t ...
Southern mountain yellow-legged frog (Rana muscosa) in the San Jacinto area of San Bernardino National Forest. USDA Forest Service Pacific Southwest Region 5 / public domain via Wikimedia Commons. The ...
A faceted crystal disperses light into a spectrum. Representative image for an article about measuring solar silver through spectral lines; this is not study data or an image of silver on the Sun.
BepiColombo's closest view of Mercury during the 4 September 2024 flyby at 165 km. Credit: ESA/BepiColombo/MTM, CC BY-SA 3.0 IGO. On 8 September 2026, Nature Astronomy published the first Mercury ...
A northern white rhinoceros at the Ol Pejeta Conservancy, Kenya. Photograph by Lengai101, CC BY 3.0, via Wikimedia Commons. The consortium trying to keep the northern white rhinoceros from ...
Two hundred million cones of red dirt, spaced out like a car park grid, and for four thousand years almost nobody bothered asking what they were for. They sit in the caatinga, a dry thorn-scrub forest ...
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